Desktop fan



FIG. 1 is a front perspective view of an desktop fan showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a side view of the other side thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a top plan view thereof. 

The ornamental design for a desktop fan, as shown. 